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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_005_032">&nbsp;</a>NAME</h4><blockquote>
ffs - find first set bit
</blockquote><h4><a name = "tag_000_005_033">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;<a href="strings.h.html">strings.h</a>&gt;

int ffs(int <i>i</i>);
</code>
</pre>
</blockquote><h4><a name = "tag_000_005_034">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>ffs()</i>
function finds the first bit set (beginning with the least significant bit)
and returns the index of that bit.  Bits are numbered starting at one (the
least significant bit).
</blockquote><h4><a name = "tag_000_005_035">&nbsp;</a>RETURN VALUE</h4><blockquote>
The
<i>ffs()</i>
function returns the index of the first bit set.  If
<i>i</i>
is 0, then
<i>ffs()</i>
returns 0.
</blockquote><h4><a name = "tag_000_005_036">&nbsp;</a>ERRORS</h4><blockquote>
No errors are defined.
</blockquote><h4><a name = "tag_000_005_037">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_005_038">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_005_039">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_005_040">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="strings.h.html">&lt;strings.h&gt;</a></i>.
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UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
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